Wiring harness or short circuit on the 2016 Mercedes Benz Metris
Only 3 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When wiring harness or short circuit gets reported
There are 6 reports of wiring harness or short circuit on the 2016 Mercedes Benz Metris, 3 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 88,000 miles. It is the 7th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 15,000 miles | — | — |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Putting it right typically runs $400–$3,500 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
Mercedes claimes that the metris is able to tow 5000lbs. We bought the vehicle new with the tow package factory installed. Mercedes never disclosed the fact that it's wiring harness included in the package does not operate electric trailer brakes and that no factory or third party option is available. We almost had an accident due to our inability to stop quickly enough. Thats how we found out that the factory installed trailer wiring harness does not operate electric brakes. Mercedes should have warned us about this issue. The factory trailer wiring harness includes a 7 wire connector, but is only wired for 6. It controls brake lights,turn signals, running lights but not electric brakes. I filed a complaint with mercedes corporate and stated how this is a safety issue. Customers may wrongly assume that their electric trailer brakes are being activated when applying the vehicles brakes. Without trailer brakes, most tow payloads are limited to 2500lbs. 5000lbs is way beyond the safe limit. Mercedes stated that there is no way for the metris to activate electric brakes. I believe that mercedes needs to warn customers of this…
Mercedes claimes that the metris is able to tow 5000lbs. We bought the vehicle new with the tow package factory installed. Mercedes never disclosed the fact that it's wiring harness included in the package does not operate electric trailer brakes and that no factory or third party option is available. We almost had an accident due to our inability to stop quickly enough. Thats how we found out that the factory installed trailer wiring harness does not operate electric brakes. Mercedes should have warned us about this issue. The factory trailer wiring harness includes a 7 wire connector, but is only wired for 6. It controls brake lights,turn signals, running lights but not electric brakes. I filed a complaint with mercedes corporate and stated how this is a safety issue. Customers may wrongly assume that their electric trailer brakes are being activated when applying the vehicles brakes. Without trailer brakes, most tow payloads are limited to 2500lbs. 5000lbs is way beyond the safe limit. Mercedes stated that there is no way for the metris to activate electric brakes. I believe that mercedes needs to warn customers of this…
Mercedes claimes that the metris is able to tow 5000lbs. We bought the vehicle new with the tow package factory installed. Mercedes never disclosed the fact that it's wiring harness included in the package does not operate electric trailer brakes and that no factory or third party option is available. We almost had an accident due to our inability to stop quickly enough. Thats how we found out that the factory installed trailer wiring harness does not operate electric brakes. Mercedes should have warned us about this issue. The factory trailer wiring harness includes a 7 wire connector, but is only wired for 6. It controls brake lights,turn signals, running lights but not electric brakes. I filed a complaint with mercedes corporate and stated how this is a safety issue. Customers may wrongly assume that their electric trailer brakes are being activated when applying the vehicles brakes. Without trailer brakes, most tow payloads are limited to 2500lbs. 5000lbs is way beyond the safe limit. Mercedes stated that there is no way for the metris to activate electric brakes. I believe that mercedes needs to warn customers of this…
Also reported on the 2016 Mercedes Benz Metris
Other fuel system problem
Other wheel or tire problem
Other visibility problem
Other engine problem
Other electrical problem
Fuel leak or fuel odor
How far this goes
This page is kept out of search results because 6 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 6 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does wiring harness or short circuit happen on the 2016 Mercedes Benz Metris?
Across 3 owner reports that included an odometer reading, half were filed by 15,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is wiring harness or short circuit on the 2016 Mercedes Benz Metris?
6 reports have been filed with NHTSA, about 1.5 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed